关于图片滚动的！急！在线等

Question

<table width="100%" border="0" cellspacing="0" cellpadding="0">
                                <tr>
                                    <td class="newdongtai" align="left">
                                        <table width="100%" border="0" cellpadding="0" cellspacing="0">
                                            <tr>
                                                <td width="229" class="newdongtai" align="left">
                                                    合作伙伴</td>
                                                <td width="50" class="more_ico">
                                                    <a href="partner.aspx">
                                                        <img src="images/more.jpg" width="37" height="13" border="0" /></a></td>
                                            </tr>
                                        </table>
                                    </td>
                                </tr>
                                <tr>
                                    <td align="center" ><div id="hdemo" style="overflow:hidden; width:280px;">
                                   <table  cellpadding="0" cellspace="0" border="0" width="100%"><tr><td id="hdemo1" style=" height:42px;">
                                     <a href="#" target="_blank">
                                            <img src="images/huoban.gif" width="113" height="42" border="0" class="partner border" /></a>
                                            <a href="#" target="_blank">
                                            <img src="images/huoban1.gif" width="113" height="42" border="0" class="partner border" /></a>
                                           </td> <td id="hdemo2" valign="top"></td></tr></table></div>
                                                  
                                       </td>
                                </tr>
                            </table>
                             <script type="text/javascript">
var Picspeed=15
hdemo2.innerHTML=hdemo1.innerHTML
function Marquee1(){
if(hdemo2.offsetWidth-hdemo.scrollLeft<=0)
hdemo.scrollLeft-=hdemo1.offsetWidth
else{
hdemo.scrollLeft++
}
}
var MyMar1=setInterval(Marquee1,Picspeed)
hdemo.onmouseover=function() {clearInterval(MyMar1)}
hdemo.onmouseout=function() {MyMar1=setInterval(Marquee1,Picspeed)}
</script> 
运行之后，图片没有滚动，只是在hdemo2里写入了hdemo1的内容，结果就成了两行显示，不知道为什么，请高手指教！！

Answer 1

hdemo1要写成
document.getElementById("hdemo1")其他类似

Answer 2

正确的
<table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td class="newdongtai" align="left">
      <table width="100%" border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td width="229" class="newdongtai" align="left">
            合作伙伴
          </td>
          <td width="50" class="more_ico">
            <a href="partner.aspx">
              <img src="images/more.jpg" width="37" height="13" border="0" /></a>
          </td>
        </tr>
      </table>
    </td>
  </tr>
  <tr>
    <td align="center">
      <div id="hdemo" style="overflow: hidden; width: 280px;">
        <table cellpadding="0" cellspace="0" border="0" width="100%">
          <tr>
            <td id="hdemo1" style="height: 42px;">
              <nobr>
<a href="#" target="_blank">
<img src="images/huoban.gif" width="113" height="42" border="0" class="partner border" /></a>
<a href="#" target="_blank">
<img src="images/huoban1.gif" width="113" height="42" border="0" class="partner border" /></a>
</nobr>
            </td>
            <td id="hdemo2" valign="top">
            </td>
          </tr>
        </table>
      </div>
    </td>
  </tr>
</table>
<script type="text/javascript">
  var Picspeed = 15
  hdemo1 = document.getElementById("hdemo1")
  hdemo2 = document.getElementById("hdemo2")
  hdemo2.innerHTML = hdemo1.innerHTML
  function Marquee1() {
    if (hdemo2.offsetWidth - hdemo.scrollLeft <= 0)
      hdemo.scrollLeft -= hdemo1.offsetWidth
    else {
      hdemo.scrollLeft++
    }
  }
  var MyMar1 = setInterval(Marquee1, Picspeed)
  hdemo.onmouseover = function () { clearInterval(MyMar1) }
  hdemo.onmouseout = function () { MyMar1 = setInterval(Marquee1, Picspeed) }
</script>

Answer 3

 hdemo1 = document.getElementById("hdemo1")
  hdemo2 = document.getElementById("hdemo2")
还得加上var 不然不会滚动，会出现对象不支持此属性

Answer 4

怎么这么严格 呀！唉，谢谢net_lover了，问题解决了